Bleach. When I heard about it for the first time the episodes where at 150 so I did a maraton of watching from episode 1 to 150 when they had it on youtube. They are gone now. Deleted. Then I started download from Dattebayo and Bleachverse. Now I am able to watch them all here, yay!!!

Yeah had that as well watched like 120 episodes in one week (maybe thats where i lost my sanity)

Longest hold for an anime should be 1 week for me since i cant stop if i start and like. The only exception would be the manga of Dead Man Wonderland due to a pause of 1year+

Inuyasha. That's been on hold since it was on Toonami, did it even have a story? All I remember is
Villagers: "There is a demon in this village!" *boring 5min backstory of said demon terrorizing village*
Inuyasha: "Windscar!" *battle with the demon is instantly over*
Inuyasha and Pals: *walks down the road to continue their journey*

Besides that, Naruto when that hit filler central as well. I've picked it back up though, but its probably been years.

REBORN! Been putting it on-hold since November 2009... Initially was because so I can watch many at one go, but now I've just become too unmotivated to pick it back up again (recently i am just generally that lazy)

im about three episodes into one piece, and i started when it came out, i havent watched naruto or bleach in over a year. the rest ive just finished after months, i made it a point not to start new shows til i finished the 15 i was in the middle of watching lol

Ehhhh I would say the longest I keep a show on hold for are months. After awhile i either pick it up again or drop it. I put Naruto on hold lots of times, i would watch diligently, then stop, then pick it up again, then stop. I finally finished it fairly recently actually. Shows currently on hold are Bleach (because i don't like the arc i am on at all) and REBORN!......no real reason for that one.

Bleach. When I heard about it for the first time the episodes where at 150 so I did a maraton of watching from episode 1 to 150 when they had it on youtube. They are gone now. Deleted. Then I started download from Dattebayo and Bleachverse. Now I am able to watch them all here, yay!!!

^I did the same thing with Bleach except I stopped right as the Bount arc began because that's where the english dubbed episodes stopped. I wanted to start back like a few months ago but after reading Bleach sucked and was ruined by fillers I decided not to continue. That rescue Rukia arc though...dang it was good. So I guess I put Bleach on 'indefinite' hold. Only anime I ever liked and didn't continue with. Too afraid to be let down and waste time with hundreds of episodes. Thank goodness for enjoying Naruto and One Piece.

Longest a series has been on hold for me is 10 years, Serial Experiments Lain. I first tried to watch it back when it aired on Tech TV and couldn't get into it. I've tried again several times but something always gets in the way. It's at the point where I know what happens because of reading synopsis of it, so keeping it on hold is actually a lot funnier. Ironically Duvet (the OP song) has been a staple on pretty much every anime mix tape/cd/playlist along with Yuudachi (Boogiepop Phantom's OP) for 10 years too. WHERE DID MY LIFE GO?!